US2550149A - Illumination duplication for photography - Google Patents

Description

. April 24, 1951 H. w. HART ILLUMINATION OUPLIOATION FOR PHOTOGRAPHY 2 Sheets-Sheet 1 Filed Sept. 14, 1946 Z A 4.3. l@

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(MMI/ll April 24, 1951 H. w. HART 2,550,149

ILLUMINTION DUPLICATION FOR PHOTOGRAPHY Filed sept. 14, 194e 2 Sheets-Sheet 2 wm; M l @Q2/fm af/mf Patented Apr. 24, 1951 ILLUMINATION DUPIQICATION FOR PHOTOGRAPHY Halten W. Hart, Toledo, Ohio Application September 14, `1946, Serial N o. 696,984

VThis invention relates to duplicating special light effects by artificial illumination, 4 This invention has utility when incorporated for checking desired shadow relations in photographic work, and manipulating to reproduce such relations upon flashlight exposure. To this end as a photographers aid, a light source is established with a location to bring out details sought for the particular picture to ybe taken. With the camera having been placed, and the exposure control therefor set, then the operator swings the unit herein to displace the flnder light as theretofore used by a flash light source. Forthwith setting oi the flash in synfchronism with the exposure, and the lm has `made a record of the predetermined highlight and shadow regions therefor. Y

Referring to the drawings:

Fig. 1 is a perspective view of an embodiment of the invention as in-use;

Fig. 2 is a side elevation of the unit of Fig. l, disconnected and in collapsed or non-use position therefor;

2 Claims. (Cl. 24U-1.3)

cated a light ray projecting reflector 2 for directing from a light source 3, as an incandescent position therefor. In this orienting, a light ray Fig. 3 is a view, with parts vbroken away, showing features of the wiring to the K dual arm-turntable structure;

Fig. l is a partial section on 4the line IVI-IV,

Fig. 3, showing theturntable pivot;

Fig. 5 is a plan view of the base for the turntable of Fig. 4, aportion being broken away to show wiring features thereto;

Fig. 6 is a view looking down on the turntable of Fig. 5, with some of the over parts shown and such at the swing position or 180 counterclockwise from Fig. 5;

Fig. 7 is a fragmentary view of the turntable of Fig. 5*.-1but with spot, in lieu of slide contacts for thefiiashlight circuit connection; 1

Fig. 8 is a section on the line VIII-VIII, Fig. 7, showing the limit stop cam for the turntable;

Fig.9 is a partially broken away side view in an enlarged scale of one of the gear segment carrying shafts; showing the screw mounting thereof in the housing; j i

Fig. 10 is a fragmentary'enlarged view showing the compressible friction member at the hingejjoint of the light carrying arm; Fig. 11 vis a plan view of one of the companion blocks of the turntable, on a larger scale than the showing in Fig. 6, and with omission of partsA upward therefrom;` and Fig. 12 is an enlarged view of a spring thrown contact pin over the view in Fig. 3, with the Y contact at a terminal 51 of Fig. 7.

Upon an adjustable tripod I there maybe 1oprojecting similar reflector I0, is brought to the finding position which had been occupied by the reector 2. A iiashlightr bulb II therein may be set 01T. 'I'he result is that the identical studied highlights and shadows found by the time exposure light 3, are duplicated for the sensitized film of the camera to record.

A normal electric lighting circuit lines I2', I3', to a fitting I4 at the base 9, provide electric current supply to a flexible insulated conductor pair I5, extending thru hollow turntable pivot IS into the housing 8, and thence by hollow arm conduit I1 to the bulb 3. Parallel side walls of the housing 8 have aligned screws I8 (Fig. 6) therethru mounting a shaft I9 having fixed thereon a friction disk120 and a sector gear 2|.

The setting of the screws I8 may-adjust the frictional holding exerted thru the housing upon the gear 2| parallel to a tangent from which the conduit I1 extends and is fixed with the gear. Adjustable clamping means 22 (Fig. 3) hold a friction member 23 at a hinge joint 24 limited to rock on an axis parallel to the axis of the shaft I9. There is clearance 25 thru'the ball of the hinge joint 24 for the electrical conductor toa lighting fixturesocketl 26 and an adapter fitting 21 carrying the reflector 2. The conduit arm I'I may swing approximately 90. on the shaft 9 as an axis.- In this movement, it

rides in av slot .or way 28 in the housing 8.

The gear sector 2| -isin mesh with a complementary gear sector 29 on a shaft 3|] mounted similarly to and in parallel with the shaft I9. FixedV with the gear 2.9.is a conduit 3| identically oppositely extendingy to the conduit I 1. 'I'he conduit 3| thru its hinge joint friction unit 22,- 23, 24, 25, socket26 and adapter 2l mounts'the reflector Vfor similar joint setting as adopted for the companion arm I1. It follows that any rocking movement imparted to the arm I1 as to its housing mounting 8 for swinging on the shaft I9, brings about the same swing movement in the same plane forthe arm 3|.

The housing 8 has a back or xed therewith a turntable insulation section or block 32 parallel to a somewhat similar insulation block 33 of the base 9. A spacing washer 34 between the plates or blocks 32, 33, and about the tube I6, provides the assembly at the turntable axis. Nuts 35 on the tube I6 hold the grouping together. On the block 33 is a thin metal wear plate 38 having depression ways or cams 31 to limit stops 38, 39, a full half diameter orv 180 apart. A spring depressed plunger pin 40 carried by the block 32 an appropriate radial distance from the axis tube I6, rides over the waysv 31 into the stop 38 at clockwise turning of the housing 8 on the base 9 to swing the reector 2 down out of or away from upward view checking position. At this stop position from the shifting of the reector 2, the duplicate reflector I I comes to the identical position just vacated by the reflector 2.

Drycells or a special different or low voltage 4electric current supply by lines 4I, 42, may be attached to fitting 43 providing a detachable connection to the base 9, swingably mounted on a vertical axis of the tripod. I. The tting 43 electrically connects to a fitting 44 in the base 9 from whichv extends conductor lines 45, 46, respectively to arc terminals 41, 48, in central area 49 opening -in the plate 36 exposing the insulation block 33.

The terminals 41, 48, are concentric with the turntable pivot I9, and have riding thereon spring thrown contact pins 59, 5I, extending thru the block 32. The contacts 50, 5I, have terminals to lines 52, 53, in conductor 54.

when the finder arm l1 has had its iight source j 3 displaced by the limit swinging of the housing 9 on its turntable connection with the base 9, the ii'aishlight II is in the identical projection location for sending out light rays which had been used by the finder projector 2. The operator may then snap a switch 55 in the lines 4I, 42, with the instant illumination result for camera sensitized film exposure'.v

The stem for the tripod I enters a socket 56 (Fig. 2) in the base 9. Accordingly, as the tripod I is set, the base 9 may be slipped thereon at the tripod stem top and the unit turned on such tripod stem as an axis, in generally directing the unitV toward the region for light exposure to be 'undertaken The stop positions 38, 39, for the turntable locate the housing 8 in register for one arm slot guide opening 28 to be up or in the direction of the tripod stemextent, andthe other opening 28 down or opposite thereto. The axis of the turntable, determined by the pivot sleeve i6, intersects the axis at the joint I, 56. With the axis IB horizontal, the axes of the parallel shafts I9, 38, in the housing 8 extendtransversely to the axis '16. These three sets of axes are thus so assembled that in the normal operation thereof Ythey locate swinging or turning in three planes at 90 relationship therebetween. The'screws I8 may so adjust the friction disk 29 that the dual arms I1, 3 i, retain a direction position set'therefor from the housing 8. Thev friction hinge 22,

23,y 24, may normally retain the free end of the f arm in alignment. However, on some occasions withthe object close Vto the view line, it is a con'- venience to rock the non-use arm toclear the 4 view line by swinging it on the friction hinge 22, 23, 24, to clear the field of illumination.

In lieu of the switch and the slide terminals 41, 48, there may be in the area 49, terminals 51, 58, to be engaged by the contacts 50, 5I at the flashlight stop position for the housing 8 as to the base 9.

What is claimed and it is desired to secure by Letters Patent is:

1. An illumination device comprising a base, a rst plate fixed with the base, a second plate, a pivotal connection providing a turntable mounting for the second plate on the rst plate, a housing fixed with the second plate providing a chamber about the axis extended of said pivotal connection, a pair of one-to-one ratio transmission interconnected rockable members in the chamber between which members said axis extended is located, the axes of rocking of said members being in a common plane parallel to the turntable plane, an arm fixed with each member and laterally oiTset from said member axes, said arms extending from the housing and having an alignment relation parallel with the planes of the axes and turntable, said arms thru said transmission being simultaneously shiftable in movement from said'alignment relation, light means, and an adjustable connection mounting a light means at the free end of each arm.

2. An illumination device comprising a base, a first insulation plate fixed with the base, a second insulation plate, a pivotal connection providing a turntable mounting for the second plate on Vthe irst plate, a housing fixed with the second plate providing a chamber about the axis extended of said pivotal connection, a pair of laterally adjacent interconnected rockable members in the chamber having said axis'extended medially therebetween, an arm from each member oiTset from said memberrocking axes and adapted to have anv aligned position and coacting thru the memberint'erconnection for simultaneous shifting therefrom, a light means carried'by each arm, complementary electrical contact means in coacting' relation between the plates, supply conductor means to the first plateY contact means, and conductor means from the Second plate contact means to the lights in the respective arms.

VHALTEN W. HART.

REFERENCES CITED The followingref'erences are of record in the le of this patent: v

` UNITED STATES PATENTS Number Germany Feb. 9. 1938

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